Smokeless boiler-furnace



(No Model.) 2 Sheets-Sheet 1.

M. MGGARTHY.

SMOKBLESS BOILER PURNAUE.

Patented 001;. 16, 1894.

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.i MICHEAL MOCARTHY, OF ST. LOUIS, MISSORI.

SMOKELESS BOILERFURNACE.`

SPECIFICATION forming part of Letters Patent No. 527,532, dated October16, 1894.

Application led June 7, 1894. Serial No. 513.755.` (No model.)

To all whom it may conocia/tl` y Beit known that I, MICHEAL MCCARTHY, acitizen of the UnitedStates, and a resident of St. Louis, State ofMissouri, have invented` certain. `new and useful Improvements inSmokeless Boiler-Furnaces, of which the following is a full, clear, andexact description,

reference being had to the accompanying hollow bridge wall19, thepositioning of which bridge-wall subdivides the interior of thefurdrawings, forming a part hereof.

The object of this invention is to be found in the provision of improvedmeans for aiding in the consumption of the products of combustionemanating from a coalfire.

This invention consists in the combination i with the fire box andbridge-wall of a plurality of air passages through the bridge-wallaffording communication between the ash-pit and the hot-air room, aplurality of air passages from the exterior to the interior of thecombustion chamberor tire box above the central portion of the grate anda plurality of air passages from the exterior of the furnace to theinterior of the hot-air room, the several air passages tending tocommingle with the products of combustion, a series of currents .l ofatmospheric air of a lower temperature than the said products ofcombustion, and by means of such commingling create an iniiammable gasto be consumed within the furnace and in its consumption destroy theoffensive gases,

i soot and heavy smoke, which otherwise would `be discharged into andthrough the chimney.

This invention consists further inthe construction, arrangement andcombination of elements, hereinafter set forth, pointed out in myclaims, and illustrated by the accompanyy ing drawings, in which- Figurel is a central longitudinal sectional elevation of a furnaceequippedwith my inf vention. Fig. 2 is a transverse sectionalelevationon the line A-A of Fig. l. Fig. 3 is a transverse sectional elevation ontheline i my device.

In the construction of the furnace as shown, the numerals 10, 11designate the side walls, 12 the front Wall,13 the back wall, and 14 theLocatedon the interior of the furnace, bei neath the boiler 14 andextending between and in `engagement with the walls 10, 11, is a naceinto what I shall term the combustion chamber or re box 20 and thehot-air room 2l. The floor of the combustion chamber 20 is preferablyinclined rearwardly.

Horizontally positioned in the combustion chamber 2O is a grate 22 andlocated immediately above the central portion of the grate and extendingtransversely of said combustion chamber, parallel with the front wall ofthe furnace is a partition 23 which serves to subdivide the upperportion of the combustion chamber into two compartments. Mounted in thepartition Wall 2.3 and extendingthrough the wallslO, 11, and intocommunication with the atmosphere outside the furnace is a pipe 24 openat both ends and provided with lateral ways or wings 25 leading downwardtherefrom through an arch plate 26 by means of which the partition issupported. Mounted transversely of the lower portion of the bridgewall19 is a plurality of registers" 26 preferably formed of clay tiling,having open ends communicating respectively with the lower portion ofthe combustion chamber 20 and the lower front portion of the hot-airchamber 21. The register 26 is located in the center of the lowerportion of the hollow bridge wall, and ports of communication areprovidedbetween the ash pit, and the combustion chamber 20. Located oneach side of the register 26, are registers or perforated tiles 26', andits ports of communication are provided between the ash pit, and theinterior of the bridge wall 19.

Pipes 27, 27, are provided in the upper por-` ICO tion of the hot-airroon1r21, which partition rests upon and is supported by an arch-plate29. The partition 28 contains a tube 30 open at both ends andcommunicating at its ends with the exterior of the furnace and at itsbody portion with the `interior of thehot-air room through the lateralways or wings 3l.

In the practical use-of this invention, combustion being performed onthe grate 22 and disseminating heat, smoke, soot and gases, verticallyand rearwardly from said grate, atmospheric air is introduced throughthe pipe 24 and wings 25 into contact with the products of combustionimmediately above the grate, and atmospheric air is introduced intocontact with the products of combustion through the outer registers 26,bridge-wall 19 and pipes 27 at the rear end of the grate 22 whereby theproducts of combustion are merged into a gas adapted for consumptionwithin the combustion chamber. Those products of combustion which passbeyond the bridge-Wall contact with the partition 28 and are deflectedthereby downwardly and beneath said partition and are causedrtokcommingle with currents of atmospheric air in-l troduced through thecentral register 26 and the pipe 30 and wings 3l Lin said partitions,whereby an iniiammable gas is produced which igniting from the inuenceof the heat emanating from the combustion chamber is consumed within thehot-air chamber.

I claim as my invention;

yl. Ina smokeless boiler furnace comprising a hollow bridge Wall,perforated tiles secured in the one half of the bridge wall for means toallow the air to pass from the ash pit, into the hollow bridge wall, anda perforated tile to allow the air to pass directly through thebridge-wall, from the ash pit, tothe combustion chamber in the rear,small pipes or tubes secured in the upper part of the hollow bridgewall,an air passage in an arch, located over the tire chamber, anda series oftubes connecting said air passage, to bring the air over the fire,substantially as shown, and for the purpose described.

2. A smokeless boiler Afurnace comprising side walls l0, ll, a frontwall 12, having fuel and waste passages and doors therein a back wall13, a boiler 14, a hollow bridge-wall 19 intermediate .of the front andback walls, a grate connecting the front wall and bridgewall, apartition 23 depending from the boiler above the grate, a pipe 24mounted in said partition and communicating with the eXterrior of thefurnace, wings25 leading from said pipe to the interior of thecombustion chamber, registers mounted in the bridgewall andcommunicating with the lower portion of the combustion chamber andhot-air yroom and theinterior of thebridge-wall, pipes leading from theinterior of the bridge-wall to points above the grate, a partition 28depending from the boiler in the rear of the bridge- Witnesses:

ALFRED A. EIoKs, HERBERT S. RoBIVNsoN.

